Simulink Control Design™ - MathWorks

yt =γ 1 cosθ 1 A 1 sinω 1 t+γ 1 sinθ 1 A 1 cosω 1 t+

γ 2 cosθ 2 A 2 sinω 2 t +γ 2 sinθ 2 A 2 cosω 2 t +....

The estimation algorithm uses Aisin(ωit) and Aicos(ωit) as regressors to estimate γicos(θi)

and γisin(θi). For N frequencies, the algorithm uses 2N regressors.

The computation assumes that the perturbation signal u(t) is applied to a plant with zero

nominal input and output. To achieve this condition, the block subtracts from the

measured plant input and output signals their values measured at the start of the

experiment.

References

[1] Wellstead, P. E., “Frequency Response Analysis.” Technical Report 10, Solartron

Instruments, Hampshire, England, 1997.

Extended Capabilities

C/C++ Code Generation

Generate C and C++ code using Simulink® Coder™.

PLC Code Generation

Generate Structured Text code using Simulink® PLC Coder™.

See Also

Closed-Loop PID Autotuner

Topics

“Online Frequency Response Estimation Basics” on page 6-2

“Deploy Frequency Response Estimation Algorithm for Real-Time Use” on page 6-11

“Online Estimation Using Plant Modeled in Simulink” on page 6-6

16 Blocks — Alphabetical List